Retry Pattern in NestJS

nestjs-retry.ts

import { Injectable } from '@nestjs/common';
import { AxiosResponse } from 'axios';

export type AxiosMethod = () => Promise<AxiosResponse>;

@Injectable()
export class Retry {
  constructor() {}

  async retry(
    axiosMethod: AxiosMethod,
    retry: number,
    delayInMs: number,
    jitter: boolean,
  ): Promise<AxiosResponse> {
    try {
      let res: AxiosResponse | null = null;

      for (let i = 0; i <= retry; i++) {
        try {
          res = await axiosMethod();
          break;
        } catch (err) {
          if (i < retry) {
            const j = this.getJitter(jitter);
            await this.executeWithDelay(delayInMs + j);
            continue
          } else {
            throw err;
          }
        }
      }
      return res;
    } catch (error) {
      throw error;
    }
  }

  private executeWithDelay(delay: number) {
    return new Promise((resolve) => setTimeout(resolve, delay));
  }

  private getJitter(jitter: boolean) {
    return jitter ? Math.floor(Math.random() * (200 - 50 + 1)) + 50 : 0;
  }
}